Sometimes it takes a few failures in finals before the big breakthrough.

Rarely does a player burst onto the scene like then-unseeded 17-year-old Boris Becker and grab a Slam. If it happens again, fans will be stunned and delighted. However, most likely, the players who have the best chance of pushing past the Big Four are in the mix right now.

Grigor Dimitrov

With a nickname like Baby Federer, how can you not win at least one Grand Slam?

Grigor Dimitrov, 21, has already pulled off some upsets in his young career. He defeated Djokovic at the Madrid Open on May 7. This came just weeks after he nearly upset Nadal at Monte Carlo.

Dimitrov has garnered respect from Nadal, who found it hard to believe the youngster wasn't ranked higher. After their match in Monte Carlo, Nadal told the ATP that he expects Dimitrov to be a Top-10 player someday.

Jo-Wilfried Tsonga

When you talk about No. 8 Jo-Wilfried Tsonga and Grand Slams, the question isn't when, but why?

Why hasn't Tsonga won one already?

The answer lies between his ears.

Tsonga has all the size, the shots and talent needed to win a Grand Slam. What he lacks is patience and poise. How many times have we watched him put together a near flawless set only to later melt down mentally.

Time is running out on the Frenchman. But if Tsonga can keep it together for just a few hours, he can beat anybody, anywhere.